Lock and latch.



No. 875,177. PATBNTED DBO. 31, 1907. N. B. HURD.

LOCK AND LATCH.

APPLICATION FILED JULY 3.1907.

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N. B. HURD.

LOCK AND LATCH.

AlPLIUATION FILED JULY3. 1907.

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NORMAN B. I-IURD, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO RUSSELL d*ERWIN MANUFACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATIONOF CONNECTICUT.

LOCK AND LATCH'.

Specification of Letters Patent.

Patented Dec. 31, 190'?.

To all whom it may concern.'

Be it known that I, NORMAN B. HURD, a citizen of the United States,residing at New Britain, county of Hartford, State of Connecticut, haveinvented certain new and useful Improvements in Locks and Latches, ofwhich the following is a full, clear, and exact description.

My invention relates to improvements in lock and latch mechanism, theobject being to provide a simple and effective construction whereby boththe dead bolt and the latch bolt may be operated by a single key. Thisend I attain by a simple arrangement of parts, which coperate in such amanner that in the event the dead bolt is advanced the first movement ofthe key will retract the dead bolt. rThe construction also is such thatit in no way interferes with other means for operating the latch bolt,such as, for example, the ordinary knob.

In the accompanying drawings, Figure 1 is a side view of a lock with thecover removed, showing both the latch bolt and dead bolt in theirextended positions; Fig. 2 is a rear elevation, the rear end of the casebeing removed; Fig. 3 is a view similar to Fig. 1, the upper part of thelock being broken away, both the latch bolt and the dead bolt in thisillustration being retracted; Fig. 4 is a side view of the dead boltdetached; Fig. 5 is a rear elevation thereof; Fig. 6 is a side elevationof a lever; Fig. 7 is an end elevation thereof; Fig. 8 is a sideelevation of another lever; Fig. 9 is an end elevation thereof.

1 is a lock case of conventional form.

2 is the front plate.

3 is the latch bolt.

4 is the dead bolt.

5 is a spring for advancing the latch bolt.

6 is a head at the rear of the latch bolt for engagement by suitablemechanism, whereby said latch bolt may be retracted.

7 is a latch bolt retractor operated by a roll-back 8, of conventionalform, controlled by the usual knob spindle (not shown).

9 is a tumbler pivoted at 10 to the lock case, having a gated passagethrough which the fence 11, carried by the pilot of the dead bolt 4,passes, when said tumbler is lifted to the proper height and the bolt 4is moved to and fro.

12 is a key passage. The key adapted to the lock is entered through thepassage 12 and when turned lifts the tumbler 9 to the proper height,then engages the tail of the bolt head 4 in the usual manner so as toretract the same. 14 is a carrier for another tumbler. As shown in thedrawings, the carrier is an extension on the lower side of the tail ofthe dead-bolt head 4 (see Fig. 4), upon which is mounted a reciprocatingtumbler 15 (see Figs. 1 and 3). This tumbler 15 is normally pressed tothe right, as viewed in the drawings, by means of a spring 16, and maybe guidedin any suitable manner, for example, by means of studs 17-17.

18 is a clearance passage between the tail of bolt`4 and the extension14 (see Fig. 4), said clearance passage being provided for the purposehereinafter set forth. In the upper side of the sliding tumbler 15 is agated passage, so located that when the said tumbler 15 has been shiftedto the proper position (see Fig. 2), the fence 19 will pass up and downtherethrough, sufficient room for vertical movement being afforded byclearance 18. This fence 19 is carried by the lever 20, which is pivotedto the dead bolt. The free end of lever 20 engages the bell crank lever21, which is pivoted to the lock case,'so that when lever 20 is liftedfrom the position shown in dotted lines (Fig. 1) to that shown in dottedlines (Fig. 3), it will shift the bell crank lever 21 from the positionshown in Fig. 1 to the position shown in Fig. 3. The lever 21 bearsagainst the tail 6 of the latch bolt.

Operation: Assuming the parts are in the position shown in Fig. 1, aproper key inserted through the passage 12 and'turned will release thebolt 4, drawing the same back. During the first of this movement thebitted end of the key will entirely clear the tumbler 15, because thesame, being carried by the dead bolt 4, will be out of range of movementof said key, the bolt 4 being advanced. When the bolt 4 is retracted,however, as shown in Fig. 3, the end of tumbler 1.5 willl then comewithinthe range of operation of the bitted end of the key; consequentlya continued rotation of said key will push the tumbler 15 forward therequisite distance, so that when the end of the key engages the lowerside of lever 20, it may lift the same to retract the latch bolt 3through the medium of lever 21. Inasmuch as the tumbler 15 is beingmoved forward at the same time the lever 20 is being lifted, it isdesirable to have the edges of the gated passage formed obvthe presentcase, a suitable clogging device is employed to prevent the turning ofthe outer knob. Such clogging device is commonly termed night latchmechanism and in the drawings that form of the night latch mechanismcomprises a sliding dogging bolt 22, operated by the thumb pieces 23-23,connected to Walking-beam 24. The bolt 22' makes engagement with theroll-back for the outer knob, consequently when this roll-back isdogged, the only way that the latch bolt 3 can be retracted is throughthe medium of a suitable keywhich operates in the manner alreadydescribed.

What I claim is- 1. In a lock and latch, a latch bolt, a dead bolt,tumbler mechanism including one tumbler carried by the case for lockingthe dead bolt, and another tumbler slidingly mounted on the dead boltfor locking the latch operating mechanism.

2. In a device ofthe character described, a dead bolt, a latch bolt, aknob-controlled roll-back for operating the latch bolt, stop- Work forsaid roll-back, means for operating both the latch bolt and the deadbolt, tumbler mechanism for locking the dead bolt, and other tumblermechanism for locking the latch retracting mechanism, the latter beingslidingly mounted on the dead bolt.

3. In a device of the character described, a dead bolt, a tumblertherefor, a latch bolt, a key-actuated means for retracting saidlatchkbolt, a tumbler for locking said means, said tumbler beingslidingly mounted on the dead bolt.

said key actuated latch bolt operating means, and a shiftable carrierfor the lastmentioned tumbler arranged to shift it to a non-operatingposition when the dead-bolt tumbler is projected.

5. In a lock and latch, a latch bolt, a dead bolt, two independent meansfor operating the latchA bolt, stop-work for clogging one of said means,a reciprocating tumbler for dog ging the other of said means, areciprocating support for the lastmentioned tumbler, a separate tumblerfor the dead bolt, and a single means for operating both of saidtumblers. l

6. In a lock and latch, a dead bolt, a tumbler therefor, a latch bolt,two independent means for operating the latch bolt, a sliding tumblerfor locking one of said means against operation, said tumbler being carried by the dead bolt and movable relatively thereon.

7. In a lock, a dead bolt, a latch bolt, a swinging tumbler for the deadbolt, a sliding tumbler carried by the dead bolt, latch-operating means,said last-mentioned tumbler cooperating therewith.

8. In combination, two bolts, tWo tumblers, a lever carried by one ofsaid bolts and operatively connected with the other, a tumbler carriedby the case for engaging one of said bolts, another tumbler slidablymounted upon the same bolt but movable independently thereof, andarranged to dog said lever, whereby both bolts may be operated throughone key hole. I l

NGRMAN B. HURD.

Witnesses:

M. S. WIARD, CHAs. E. RUssELL.

